Abstract

This research is aimed at knowing the mastery of English vocabulary of the 1993 students of the Natural Sciences Faculty (MIPA) of Diponegoro University who have taken English I and II.
To reach the objective, the research team has observed the sum of 21 respondents by giving them tests and questionaires to collect data. The tests and
questionaires include productive and receptive vocabulary.
The collected data are grouped and analyzed based on their kids (such as nouns, verbs, adjectives, adverbs. and function words) and they are also analyzed in terms of their usage in various constractions, such as in phrases, clauses, and sentences.
The result of the reasearch shows that the vocabulary mastery of the respondents can be classified as follows :
1. The vocabulary of the first thousand word list dominates the other words both in receptive use and productive use almost in every kinds of words.
2. The vocabulary of the university word list is greater in number than that of the second thousand and the third thousand word list.
3. Most of the respondents are not able to use the mastered vocabulaery to write sentences.